Battery test fixtures, battery test methods, devices, media and procedures products

Abstract

This application provides a battery testing fixture, battery testing method, apparatus, medium, and program product. The top plate and base of the fixture are connected by a support rod. A motor is fixedly installed below the top plate, with the motor's rotating shaft connected to one end of a lead screw, and the other end of the lead screw connected to a pressure head. A pressure sensor is located below the pressure head, and a first temperature sensor is located at the projection position of the base. A heating device is located above the first temperature sensor. A controller is electrically connected to the pressure sensor, the first temperature sensor, the heating device, and the fan. During testing, the controller controls the operation of the heating device or the fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor; it also controls the motor based on a preset uniform pressure and the battery pressure collected by the pressure sensor. This solution, through the fan and heating device, achieves a battery temperature close to the preset uniform temperature, reducing battery temperature differences.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, and in particular to a battery testing fixture, battery testing method, apparatus, medium and program product. Background Technology

[0002] With the development of technology, various types of batteries have emerged. After a battery is developed, it needs to be placed in a test fixture to perform charge and discharge performance tests to determine whether its performance meets the requirements.

[0003] In the prior art, batteries from the same batch can be tested using multiple test fixtures. The batteries are placed in the test fixtures, and the test fixtures are placed in the same oven for testing.

[0004] However, placing the test fixtures at different heights in the oven can lead to significant temperature differences in the batteries. Summary of the Invention

[0005] The battery testing fixture, battery testing method, apparatus, medium, and program products provided in this application are intended to solve the problem of large temperature differences in batteries caused by placing the testing fixture in an oven for temperature control in the prior art.

[0006] In a first aspect, embodiments of this application provide a battery testing fixture, comprising:

[0007] Top plate, base, multiple support rods, motor, lead screw, pressure head, pressure sensor, first temperature sensor, heating equipment, fan and controller;

[0008] The top plate and the base are connected by the plurality of support rods. The motor is fixedly installed below the top plate. The rotating shaft of the motor is connected to one end of the lead screw, and the other end of the lead screw is connected to the pressure head. The pressure sensor is located below the pressure head. The first temperature sensor is located at the projection position of the base. The heating device is located above the first temperature sensor.

[0009] The controller is electrically connected to the pressure sensor, the first temperature sensor, the heating device, and the fan, respectively.

[0010] The controller is used for:

[0011] During the test, the heating device or the fan is controlled to operate according to the preset uniform temperature and the battery temperature collected by the first temperature sensor.

[0012] The motor is controlled to operate based on a preset uniform pressure and the battery pressure collected by the pressure sensor.

[0013] In one possible implementation, the controller, when controlling the operation of the heating device or the fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor, is specifically used for:

[0014] If the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, then the fan is controlled to face the preset first direction and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature; the preset first direction is the location of the battery.

[0015] If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature.

[0016] In one possible implementation, the controller, in controlling the operation of the motor based on a preset uniform pressure and the battery pressure collected by the pressure sensor, specifically performs the following functions:

[0017] If the difference between the battery pressure and the preset uniform pressure is greater than the preset first pressure difference, the motor is controlled to run in a preset first direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure; the preset first direction is the direction that drives the lead screw to retract.

[0018] If the difference between the preset uniform pressure and the battery pressure is greater than the preset second pressure difference, the motor is controlled to run in the preset second direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure; the preset second direction is the direction in which the lead screw extends.

[0019] In one possible implementation, the battery test fixture further includes an insulating shell and a cover plate, the insulating shell having a vent, and the cover plate being movably connected to the outside of the vent via a pivot.

[0020] The top plate, the base, the plurality of support rods, the motor, the lead screw, the pressure head, the pressure sensor, the first temperature sensor, the heating device, and the fan are all located inside the insulation shell;

[0021] The controller, in controlling the operation of the heating device or the fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor, is specifically used for:

[0022] If the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, the fan is controlled to face the preset second direction and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature; the preset second direction is the direction where the vent is located.

[0023] If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature.

[0024] In one possible implementation, the battery test fixture further includes a second temperature sensor and a third temperature sensor;

[0025] The second temperature sensor is located below the top plate, and the third temperature sensor is located above the base;

[0026] The second temperature sensor and the third temperature sensor are electrically connected to the controller;

[0027] The controller is also used for:

[0028] The difference between the ambient temperatures collected by the second temperature sensor and the third temperature sensor is calculated in real time.

[0029] If the absolute value of the difference is greater than the preset ambient temperature difference threshold, the fan is controlled to face the preset third position and the fan is controlled to run until the absolute value of the difference is equal to the preset ambient temperature difference threshold; the preset third position is different from the preset second position.

[0030] In one possible implementation, the controller is further configured to:

[0031] Before testing, the heating device is controlled to operate at a preset first power until the battery temperature collected by the first temperature sensor is equal to the preset power reduction temperature. Then, the heating device is controlled to operate at a preset second power until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature. The preset first power is greater than the preset second power, and the preset uniform temperature is greater than the preset power reduction temperature.

[0032] The motor is controlled to run at a preset first speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset speed reduction pressure. The motor is then controlled to run at a preset second speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset unified pressure. The preset first speed is greater than the preset second speed, the preset second direction is the direction that drives the lead screw to extend, and the preset unified pressure is greater than the preset speed reduction pressure.

[0033] In a second aspect, embodiments of this application provide a battery testing method, applied to a controller in a battery testing fixture as described in any one of the first aspects, the method comprising:

[0034] During the test, the heating equipment or fan is controlled to operate based on the preset uniform temperature and the battery temperature collected by the first temperature sensor.

[0035] The motor is controlled based on a preset uniform pressure and the battery pressure collected by a pressure sensor.

[0036] Thirdly, embodiments of this application provide a battery testing device, which is applied to a controller in a battery testing fixture according to any one of the first aspects, the device comprising:

[0037] The temperature control module is used to control the operation of heating equipment or fan during the test, based on a preset uniform temperature and the battery temperature collected by the first temperature sensor.

[0038] The pressure control module is used to control the motor operation based on a preset uniform pressure and the battery pressure collected by the pressure sensor.

[0039] Fourthly, embodiments of this application provide a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the battery testing method described in the second aspect.

[0040] Fifthly, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, is used to implement the battery testing method described in the second aspect.

[0041] The battery testing fixture, method, apparatus, medium, and program products provided in this application embodiment include a top plate and a base connected by a support rod in the fixture. A motor is fixedly installed below the top plate, with the motor's rotating shaft connected to one end of a lead screw, and the other end of the lead screw connected to a pressure head. A pressure sensor is located below the pressure head, and a first temperature sensor is positioned at the projection location of the base. A heating device is located above the first temperature sensor. A controller is electrically connected to the pressure sensor, the first temperature sensor, the heating device, and the fan. During testing, the controller controls the operation of the heating device or the fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor; it also controls the motor based on a preset uniform pressure and the battery pressure collected by the pressure sensor. This solution, through the fan and heating device, achieves a battery temperature close to the preset uniform temperature, reducing battery temperature differences. Attached Figure Description

[0042] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0043] Figure 1 Schematic diagram of the battery testing fixture provided in this application Figure 1 ;

[0044] Figure 2 This is a schematic diagram of the array-type temperature sensor or array-type pressure sensor provided in this application;

[0045] Figure 3 Schematic diagram of the battery testing fixture provided in this application Figure 2 ;

[0046] Figure 4 A schematic diagram of the flexible insulation layer provided in this application;

[0047] Figure 5 Schematic diagram of the battery testing fixture provided in this application Figure 3 ;

[0048] Figure 6 This is a flowchart illustrating an embodiment of the battery testing method provided in this application;

[0049] Figure 7 This is a schematic diagram of the structure of an embodiment of the battery testing device provided in this application.

[0050] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0051] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0052] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] With the development of technology, various types of batteries have emerged. After a battery is developed, it needs to be placed in a test fixture to perform charge and discharge performance tests to determine whether its performance meets the requirements.

[0054] In existing technology, batteries from the same batch can be tested using multiple test fixtures. The batteries are placed in the test fixtures, and the test fixtures are placed in the same oven for testing. However, the test fixtures are placed at different heights in the oven, resulting in different temperatures at different locations. This can lead to significant temperature differences in the batteries, which in turn can cause inaccurate test results.

[0055] To address the problems existing in the prior art, the inventors, during their research on battery testing fixtures, discovered that to improve testing accuracy, it is necessary to maintain consistent temperature and pressure across different batteries. Furthermore, the temperature and pressure of the same battery must remain stable during testing. Therefore, heating equipment and a fan can be added to the fixture. During testing, the operation of the heating equipment or fan is controlled according to a preset uniform temperature. Simultaneously, the motor operation is controlled according to a preset uniform pressure. Based on the above inventive concept, the battery testing fixture described in this application was designed.

[0056] The technical solution of this application will now be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0057] The structure of the battery testing fixture will be described below using Embodiment 1 of the battery testing fixture provided in this application. For example, Figure 1 Schematic diagram of the battery testing fixture provided in this application Figure 1 ,like Figure 1 As shown, the battery test fixture includes a top plate 101, a base 102, multiple support rods (only two support rods are shown in the figure, namely the first support rod 103 and the second support rod 104), a motor 105, a lead screw 106, a pressure head 107, a pressure sensor 108, a first temperature sensor 109, a heating device 110, a fan 111, and a controller 112.

[0058] It should be noted that, due to Figure 1 The image shows a front view. Behind the first support rod 103, there is a third support rod, and behind the second support rod 104, there is a fourth support rod.

[0059] It should be noted that the number of support rods can be 3, 4, 5, 7, etc. This application embodiment does not limit the number of support rods, and can be determined according to the actual situation.

[0060] The top plate 101 and the base 102 are connected by multiple support rods. The motor 105 is fixedly installed below the top plate 101. The rotating shaft of the motor 105 is connected to one end of the lead screw 106, and the other end of the lead screw 106 is connected to the pressure head 107. The pressure sensor 108 is located below the pressure head 107. The first temperature sensor 109 is located at the projection position of the base 102, and the heating device 110 is above the first temperature sensor 109.

[0061] In one implementation, the pressure sensor 108 is located at the projection position of the base 102, and the heating device 110 is connected to the pressure head.

[0062] The controller 112 is electrically connected to the pressure sensor 108, the first temperature sensor 109, the heating device 110, and the fan 111, respectively.

[0063] It should be noted that the fan 111 and the controller 112 can be fixed by connecting them to the base 102, the top plate 101 or the support rod through the bracket. The embodiments of this application do not limit the installation position of the first temperature sensor, the fan and the controller, which can be determined according to the actual situation.

[0064] It should be noted that a rigid heat transfer body can be added above the heating device 110. The heating device 110 transfers heat to the battery through the rigid heat transfer body to heat the battery. The heating device 110 can be a flexible heating device that can be closely attached to the first temperature sensor 109 and the rigid heat transfer body, so as to quickly heat the rigid heat transfer body. The temperature detected by the first temperature sensor 109 can characterize the battery temperature.

[0065] Before testing, the staff placed the battery on top of the heating device 110 (if a rigid heat transfer body is added above the heating device 110, the battery is placed on top of the rigid heat transfer body). The controller 112 controlled the motor 105 to run, so that the pressure head 107 pressed down on the battery, and then the test could be carried out.

[0066] Controller 112 is used for:

[0067] During the test, it is necessary to ensure that the temperature and pressure of the battery change little. Based on the preset uniform temperature and the battery temperature collected by the first temperature sensor 109, the heating device 110 or the fan 111 is controlled to operate.

[0068] The motor 105 is controlled to run based on the preset uniform pressure and the battery pressure collected by the pressure sensor 108.

[0069] It should be noted that the preset uniform temperature can be 25 degrees Celsius, 35 degrees Celsius, 45 degrees Celsius, 60 degrees Celsius, etc.; the preset uniform pressure can be 50N, 100N, 1000N, 10000N, etc. This application embodiment does not limit the preset uniform temperature and preset uniform pressure, and can be determined according to the actual situation.

[0070] Specifically, if the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, it indicates that the battery temperature is too high. In this case, the fan 111 is controlled to move towards the preset first position and the fan 111 is controlled to run to achieve cooling until the battery temperature collected by the first temperature sensor 109 is equal to the preset uniform temperature, and the fan 111 is controlled to stop running. The preset first position is the position where the battery is located.

[0071] If the difference between the preset uniform temperature and the battery temperature is greater than the difference between the preset second temperature, it means that the battery temperature is too low. Then, the heating device 110 is controlled to heat up until the battery temperature collected by the first temperature sensor 109 is equal to the preset uniform temperature, and the heating device 110 is controlled to stop heating.

[0072] It should be noted that the preset first temperature difference and the second temperature difference can be 1 degree Celsius, 3 degrees Celsius, 5 degrees Celsius, 10 degrees Celsius, etc. This application embodiment does not limit the preset first temperature difference and the second temperature difference, and can be determined according to the actual situation.

[0073] If the difference between the battery pressure and the preset uniform pressure is greater than the preset first pressure difference, it indicates that the battery pressure is too high. Then, the motor 105 is controlled to run in the preset first direction to reduce the pressure until the battery pressure collected by the pressure sensor 108 is equal to the preset uniform pressure, and the motor 105 is controlled to stop rotating. The preset first direction is the direction that drives the lead screw 106 to retract.

[0074] If the difference between the preset uniform pressure and the battery pressure is greater than the preset second pressure difference, it means that the battery pressure is low. Then, the motor 105 is controlled to run in the preset second direction to increase the pressure until the battery pressure collected by the pressure sensor 108 is equal to the preset uniform pressure, and the motor 105 is controlled to stop rotating. The preset second direction is the direction in which the lead screw 106 extends.

[0075] It should be noted that the preset first direction and the preset second direction are opposite. When the preset first direction is clockwise, the preset second direction is counterclockwise; when the preset first direction is counterclockwise, the preset second direction is clockwise.

[0076] It should be noted that the first temperature sensor 109 can be an array-type temperature sensor, which can collect the temperature at multiple locations on the battery. The battery temperature used by the controller 112 is the average of multiple temperatures, which can improve the accuracy of the battery temperature and thus improve the accuracy of the test.

[0077] It should be noted that the pressure sensor 108 can be an array-type pressure sensor, which can collect the pressure at multiple locations on the battery. The battery pressure used by the controller 112 is the average of multiple pressures, which can improve the accuracy of the battery pressure and thus improve the accuracy of the test.

[0078] For example, Figure 2 A schematic diagram of the array-type temperature sensor or array-type pressure sensor provided in this application is shown below. Figure 2 As shown in the figure, the black dots represent temperature measurement points or pressure measurement points.

[0079] It should be noted that the top plate refers to the load-bearing component located on the upper part of the fixture and used to install the drive components. It provides an installation reference for the motor and lead screw, and together with the base and support rod, defines the clamping space inside the fixture. In terms of position and relationship, the top plate is set above the battery testing area and is usually connected to the support rod by bolts, welding, or snap-fit ​​installation, providing rigid support for the motor. In terms of shape and material, the top plate can be made of metal plates, profile frames, or composite reinforcing plates. Metal plates can be aluminum alloy plates, stainless steel plates, or carbon steel plates. Profile frames can be square tube welded frames, aluminum profile splicing frames, or bent reinforcing frames. Composite reinforcing plates can be metal substrates, sandwich plates, or ribbed reinforcing plates. In terms of size and proportion, the planar shape of the top plate usually corresponds to the base, and its length and width are slightly larger than the external dimensions of the battery to ensure the installation space for the motor and lead screw and the pressure head stroke space.

[0080] The base is a reference component located at the bottom of the fixture, used to support the battery under test. It provides a flat surface for the battery and withstands the reaction force applied by the pressure head. Positionally, the base and top plate are positioned vertically opposite each other, forming a stable frame structure through support rods. The pressure sensor is located on the upper surface of the base or inside the base at a position corresponding to the projection of the pressure head, so as to directly output a pressure signal when pressure is applied. In terms of shape and material, the base can be a flat support, a support with positioning grooves, or a modular assembly base. The support can be made of steel plate, aluminum plate, or high-strength insulating board. The positioning groove can be a metal-edged groove, an injection-molded insert groove, or a machined groove structure. In terms of size and proportion, the pressure-bearing area of ​​the base is adapted to the bottom surface of the battery, and its planar dimensions can be slightly larger than the outer contour of the battery. The thickness of the base is determined based on the load-bearing strength and the sensor installation space. The inner surface of the base can be heat-insulated.

[0081] A support rod is a supporting component that connects the top plate and the base and maintains the distance between them. It forms the overall skeleton of the fixture and ensures the relative positional stability between the indenter's movement direction and the base plane. In terms of location and relationship, the support rod is set in the peripheral area between the top plate and the base, usually at least on opposite sides or at the four corners, and is connected to the top plate and the base by threaded connection, flange connection, welding fixation, or plug-in locking method. In terms of shape and material, the support rod can be a cylindrical rod, a square rod, or a profile column, and the rod body can be made of stainless steel, carbon steel, or aluminum alloy. In terms of size and proportion, the length of the support rod is used to provide the clamping stroke of the lead screw, indenter, and battery under test, and its cross-sectional dimensions are matched with the load-bearing capacity of the fixture to maintain rigidity and coaxiality during the clamping process.

[0082] An electric motor is an actuator that provides rotational driving force. It drives the lead screw to rotate and moves the pressure head to lift or lower, thereby applying or releasing pressure to the battery under test. In terms of position and relationship, the motor is fixedly installed below the top plate. The motor's rotating shaft (output shaft) is coaxially connected to one end of the lead screw. The connection method can be a coupling connection, a direct connection, or a reduction mechanism connection. In terms of shape and material, the motor can be a stepper motor, a servo motor, or a DC geared motor. The motor housing can be an aluminum housing, a steel housing, or a plastic heat dissipation housing. In terms of size and proportion, the motor installation dimensions match the reserved installation holes on the top plate to meet the internal layout requirements of the fixture.

[0083] In one implementation, the motor and the lead screw can be connected by a reduction gear, thereby reducing the speed and increasing the torque.

[0084] A lead screw is a transmission component that converts the rotational motion of a motor into linear displacement. It is used to transmit the rotational driving force of the motor to the pressure head and control the vertical movement of the pressure head. In terms of position and relationship, one end of the lead screw is connected to the output shaft of the motor, and the other end is installed with the pressure head. The lead screw can form an adjustable transmission relationship with the pressure head through a nut seat, slider seat, or guide sleeve. In terms of shape and material, the lead screw can be a trapezoidal lead screw, ball screw, or ordinary threaded lead screw. The material can be alloy steel, surface hardened steel, or stainless steel, and can be chrome-plated, quenched, or surface-ground as needed. In terms of size and proportion, the lead screw lead and the pressure head displacement can be matched according to the transmission ratio, and the length of the lead screw should meet the requirements of the maximum stroke of the pressure head and the installation end margin.

[0085] The pressure head is a pressure-applying component located at the lower end of the lead screw and acting directly on the battery surface. It is used to transmit the displacement and pressure output by the lead screw to the battery under test and form a pressure closed-loop control with the pressure sensor. In terms of position and relationship, the pressure head is located above the base and is arranged corresponding to the pressure sensor. The pressure head can be connected to the end of the lead screw through threaded connection, flange fixing, snap-fit ​​connection, or detachable connection. In terms of shape and material, the pressure head can be a flat-headed pressure block or an arc-shaped pressure block. The flat-headed pressure block can be made of a flat metal pressure plate, and the arc-shaped pressure block can be made of an arc-shaped contact block. In terms of size and proportion, the force-bearing surface of the pressure head is usually slightly larger than the pressure surface of the battery to form a relatively uniform contact pressure. The thickness of the pressure head is matched with its rigidity and buffering requirements.

[0086] It should be noted that the shape of the pressure head can be circular, rectangular, triangular, etc., to adapt to testing different types of batteries. This application does not limit the shape of the pressure head, and it can be determined according to the actual situation.

[0087] The pressure sensor is located directly below the pressure head. The pressure sensor can be a thin-film, piezoresistive, or strain gauge type. The thin-film type can be a flexible composite membrane sensing unit, the piezoresistive type can be a semiconductor piezoresistive sheet structure, and the strain gauge type can be a metal strain beam with a measurement bridge circuit. In terms of size and proportion, the effective sensing area of ​​the pressure sensor should match the force projection area of ​​the pressure head, and its thickness should be minimized to reduce the impact on the clamping height.

[0088] The first temperature sensor is located on the inner surface of the base, which is insulated. The first temperature sensor can be a thermistor array temperature sensor, a thermocouple, a thermistor, or a digital temperature chip. The thermocouple can be a thin-wire probe, the thermistor can be a bead or a chip element, and the digital temperature chip can be a surface-mount device.

[0089] In terms of form and material, heating equipment can use heating elements, heating films or resistance heating modules. Heating elements can be silicone heating elements, metal-based heating elements or mica heating elements. Heating films can be flexible electric heating films, thin-layer composite films or sheet heating films. Resistance heating modules can be ceramic heating elements, wire-wound resistors or metal foil heating elements.

[0090] The fan can be an axial flow fan, a centrifugal fan, or a miniature blower, and the fan impeller can be a plastic impeller, a metal impeller, or a composite impeller.

[0091] It should be noted that the battery testing fixture in this application is suitable for solid-state batteries. Multiple solid-state batteries can be placed separately in the battery testing fixture for testing, which not only ensures that the temperature and pressure of different solid-state batteries are consistent, but also ensures that the temperature and pressure of the solid-state batteries are stable during the testing process.

[0092] The battery testing fixture provided in this application embodiment has a top plate connected to a base via a support rod. A motor is fixedly installed below the top plate, with its rotation shaft connected to one end of a lead screw, and the other end connected to a pressure head. A pressure sensor is located below the pressure head, a first temperature sensor is positioned at the projection location of the base, and a heating device is located above the first temperature sensor. A controller is electrically connected to the pressure sensor, the first temperature sensor, the heating device, and a fan. During testing, the controller controls the operation of the heating device or fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor; it also controls the motor based on a preset uniform pressure and the battery pressure collected by the pressure sensor. This solution, through the fan and heating device, achieves a battery temperature close to the preset uniform temperature, reducing battery temperature differences. This not only ensures that the temperature of the same battery is close to the preset uniform temperature throughout the entire testing process, but also that the temperature of different batteries within the same batch or different batches is close to the preset uniform temperature, improving testing accuracy, stability, and consistency.

[0093] By controlling the motor to ensure that the battery pressure is close to a preset uniform pressure, the pressure difference between batteries is reduced. This not only ensures that the pressure of the same battery is close to the preset uniform pressure throughout the entire test, but also that the pressure of different batteries within the same batch or different batches is close to the preset uniform pressure, thereby improving the accuracy, stability, and consistency of the test.

[0094] In addition, by only starting the fan when the difference between the battery temperature and the preset uniform temperature is greater than the first preset temperature difference, and only starting the heating equipment when the difference between the preset uniform temperature and the battery temperature is greater than the second preset temperature difference, frequent starting of the fan and heating equipment can be avoided, extending the service life of the fan and heating equipment, reducing energy consumption, and improving the stability of temperature control.

[0095] By controlling the motor to rotate when the difference between the battery pressure and the preset uniform pressure is greater than a preset first pressure difference, and when the difference between the preset uniform pressure and the battery pressure is greater than a preset second pressure difference, frequent motor starts can be avoided, the motor's service life can be extended, energy consumption can be reduced, and the stability of pressure control can be improved.

[0096] By using temperature and pressure sensors, real-time monitoring of temperature and pressure can be achieved, improving the accuracy of the collected data. Temperature and pressure control can be achieved without manual intervention, without significant modifications to the test fixtures, and without the need for an oven, thus saving costs.

[0097] Based on the above embodiments, the following description uses a second embodiment of the battery testing fixture provided in this application to illustrate a case where the battery testing fixture also includes an insulation shell and a cover plate. For example, in... Figure 1 On this basis, Figure 3 Schematic diagram of the battery testing fixture provided in this application Figure 2 ,like Figure 3 As shown, the battery test fixture also includes an insulation shell 113 and a cover plate 114.

[0098] The thermal insulation shell 113 has a vent, and the cover plate 114 is movably connected to the outside of the vent via a pivot.

[0099] When the fan 111 blows air towards the vent, it will lift the cover 114, allowing heat to dissipate from the insulation shell and cool the battery. When the fan 111 is not blowing air towards the vent, the cover 114 will cover the vent to maintain its temperature.

[0100] The top plate 101, base 102, each support rod, motor 105, lead screw 106, pressure head 107, pressure sensor 108, first temperature sensor 109, heating device 110 and fan 111 are all located inside the insulation shell 113.

[0101] It should be noted that the controller 112 can be located inside or outside the insulation housing 113. When located outside the insulation housing 113, the insulation housing 113 also includes a cable through-hole through which the connecting cables of the controller 112 to the pressure sensor 108, the first temperature sensor 109, the heating device 110, and the fan 111 will pass. This embodiment does not limit the positional relationship between the controller and the insulation housing; it can be determined according to the actual situation.

[0102] In this embodiment, the pressure control method is the same as that in Embodiment 1, and will not be described again here.

[0103] Regarding temperature control, if the difference between the battery temperature and the preset unified temperature is greater than the preset first temperature difference, it indicates that the battery temperature is too high. The controller 112 then controls the fan 111 to face the preset second position and controls the fan 111 to run until the battery temperature collected by the first temperature sensor 109 is equal to the preset unified temperature, and then controls the fan 111 to stop running. The preset second position is the position where the ventilation opening is located.

[0104] If the difference between the preset uniform temperature and the battery temperature is greater than the difference between the preset second temperature, it indicates that the battery temperature is too low. The controller 112 then controls the heating device 110 to heat until the battery temperature collected by the first temperature sensor 109 equals the preset uniform temperature, and then controls the heating device 110 to stop heating.

[0105] It should be noted that the thermal insulation shell can be achieved using a flexible insulation layer, which is wrapped around the test fixture body using Velcro or magnetic attachment to form the thermal insulation shell. For example, Figure 4 A schematic diagram of the flexible insulation layer provided in this application is shown below. Figure 4 As shown, the flexible insulation layer has ventilation openings, and covers can be installed on the outside of the ventilation openings.

[0106] It should be noted that the insulation shell can be box-type, semi-enclosed, or enclosed sandwich shell in shape. Materials can include a metal shell with a polyurethane insulation layer, an aluminum alloy shell with an aerogel insulation layer, or a steel plate shell with rock wool, vacuum insulation panels, or other composite sandwich structures to balance structural strength and insulation performance. The cover can be a flat flip-top, a curved flip-top, or a rotating door with sealing strips. The pivot can be a through-type metal pivot, a hinged pivot with a damping mechanism, or a detachable pin structure. The ventilation openings can be rectangular, circular, or have louvered airflow guides. Typically, the internal dimensions of the insulation shell should meet the requirements for the installation of the fixture body, the fan's air delivery distance, and the air circulation return space. The cover's external dimensions should be larger than the ventilation opening size while allowing for necessary rotation clearance. The ventilation opening area can be matched to the fan airflow and target heat exchange rate. The insulation layer thickness can be selected based on the test temperature range and allowable heat loss.

[0107] The battery testing fixture provided in this application embodiment can keep the battery warm and maintain a stable battery temperature by adding an insulating shell. The insulating shell has ventilation openings, and a cover plate is movably connected to the outside of the ventilation openings via a pivot, enabling ventilation and cooling when the temperature is high, and heat preservation when cooling is not required.

[0108] Based on the above embodiments, the following description, using Embodiment 3 of the battery testing fixture provided in this application, illustrates a case where the battery testing fixture further includes a second temperature sensor and a third temperature sensor. For example, in... Figure 3On this basis, Figure 5 Schematic diagram of the battery testing fixture provided in this application Figure 3 ,like Figure 5 As shown, the battery test fixture also includes a second temperature sensor 115 and a third temperature sensor 116.

[0109] The second temperature sensor 115 is located below the top plate 101, and the third temperature sensor 116 is located above the base 102.

[0110] The second temperature sensor 115 and the third temperature sensor 116 are electrically connected to the controller 112.

[0111] Controller 112 is also used for:

[0112] The difference between the ambient temperature collected by the second temperature sensor 115 and the third temperature sensor 116 is calculated in real time.

[0113] If the absolute value of the difference is greater than the preset ambient temperature difference threshold, it indicates that the temperature difference inside the insulation shell 113 is large. Then, the fan 111 is controlled to move towards the preset third position and the fan 111 is controlled to run until the absolute value of the difference is equal to the preset ambient temperature difference threshold, and the fan 111 is controlled to stop running.

[0114] It should be noted that the preset ambient temperature difference threshold can be 1 degree Celsius, 3 degrees Celsius, 5 degrees Celsius, etc. This application embodiment does not limit the preset ambient temperature difference threshold, which can be determined according to the actual situation.

[0115] It should be noted that the preset third position is different from the preset second position. It can be any position other than the preset second position, which can enable air circulation and reduce the temperature difference inside the insulation shell 113.

[0116] It should be noted that the second and third temperature sensors can be fixed in their respective positions using methods such as surface mounting, bracket fixing, threaded pressing, or embedded arrangement to reduce the impact of vibration and airflow disturbance on the measurement results. In terms of implementation, they can employ structures such as thermistors, thermocouples, digital temperature modules, or infrared temperature probes. The outer surface of the probe can be equipped with a metal protective sleeve, a high-temperature resistant encapsulating resin layer, an insulating sheath, and high-temperature resistant wires to improve its stability and durability under high-temperature, thermal cycling, and long-term use conditions within the fixture.

[0117] The battery testing fixture provided in this application can maintain a stable internal temperature of the insulation shell by adjusting the fan when a large difference in ambient temperature is detected between the second and third temperature sensors, thereby improving testing accuracy.

[0118] Based on the above embodiments, the following describes, through the fourth embodiment of the battery test fixture provided in this application, the situation where the controller controls the heating equipment and motor before testing to achieve temperature control and pressure control.

[0119] Before testing, in order to improve the accuracy and stability of the test, the battery temperature and pressure need to be raised to a preset uniform temperature and pressure after the battery is placed in the battery test fixture.

[0120] The controller 112 controls the heating device 110 to operate at a preset first power until the battery temperature collected by the first temperature sensor 109 is equal to the preset power reduction temperature. Then, the controller controls the heating device 110 to operate at a preset second power until the battery temperature collected by the first temperature sensor 109 is equal to the preset uniform temperature. Finally, the controller controls the heating device 110 to stop heating.

[0121] It should be noted that the preset first power is greater than the preset second power, and the preset uniform temperature is greater than the preset power reduction temperature. The preset first power can be 100W, 200W, 500W, etc., the preset second power can be 10W, 20W, 50W, etc., and the preset power reduction temperature can be 20 degrees Celsius, 30 degrees Celsius, 40 degrees Celsius, 55 degrees Celsius, etc. This application does not limit the preset first power, preset second power, and preset power reduction temperature; they can be determined according to actual conditions.

[0122] The controller 112 controls the motor 105 to run at a preset first speed and a preset second direction until the battery pressure collected by the pressure sensor 108 is equal to the preset speed reduction pressure. Then, the controller 112 controls the motor 105 to run at a preset second speed and a preset second direction until the battery pressure collected by the pressure sensor 108 is equal to the preset uniform pressure, and then controls the motor 105 to stop rotating.

[0123] It should be noted that the preset first speed is greater than the preset second speed, and the preset uniform pressure is greater than the preset speed reduction pressure. The preset first speed can be 500 rpm, 800 rpm, 1000 rpm, etc., and the preset second speed can be 50 rpm, 80 rpm, 100 rpm, etc. The preset speed reduction pressure can be 45 N, 90 N, 900 N, 9000 N, etc. This application embodiment does not limit the preset first speed, preset second speed, and preset speed reduction pressure; they can be determined according to actual conditions.

[0124] It should be noted that the controller can control the motor speed by transmitting a speed signal to the motor, and can also control the motor speed by transmitting a frequency signal or a voltage signal to the motor. The embodiments of this application do not limit the way the controller controls the motor speed, and can be determined according to the actual situation.

[0125] After the battery temperature and pressure reach a preset uniform temperature and pressure, temperature and pressure maintenance can be performed. After a preset time, the testing process can begin. The preset time can be 10 minutes, 30 minutes, 1 hour, etc. This application embodiment does not limit the preset time and can be determined according to the actual situation.

[0126] The battery testing fixture provided in this application, by first rapidly heating to a preset power reduction temperature and then slowly heating to a preset uniform temperature, ensures heating efficiency while avoiding temperature overshoot due to thermal inertia, significantly improving the stability and accuracy of temperature control. Similarly, by first rapidly increasing the pressure to a preset speed reduction pressure and then slowly increasing the pressure to a preset uniform pressure, it ensures pressure increase efficiency while effectively avoiding pressure fluctuations and component damage caused by overshoot, improving the stability and reliability of pressure control.

[0127] The following describes, through an embodiment of the battery testing method provided in this application, how the controller in the battery testing fixture controls the heating equipment, fan, and motor to achieve temperature and pressure control.

[0128] For example, Figure 6 This is a schematic flowchart illustrating an embodiment of the battery testing method provided in this application. Figure 6 As shown, the battery testing method specifically includes the following steps:

[0129] S601: During the test, the heating equipment or fan is controlled to operate based on the preset uniform temperature and the battery temperature collected by the first temperature sensor.

[0130] In this step, if the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, the fan is controlled to face the preset first position and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature.

[0131] If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor equals the preset uniform temperature.

[0132] S602: Controls the motor operation based on the preset uniform pressure and the battery pressure collected by the pressure sensor.

[0133] If the difference between the battery pressure and the preset uniform pressure is greater than the preset first pressure difference, the motor is controlled to run in the preset first direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure.

[0134] If the difference between the preset uniform pressure and the battery pressure is greater than the preset second pressure difference, the motor is controlled to run in the preset second direction until the battery pressure collected by the pressure sensor equals the preset uniform pressure.

[0135] It should be noted that the implementation process of steps S601 and S602 is similar to that of the first embodiment of the battery test fixture, and will not be described again here.

[0136] It should be noted that steps S601 and S602 are not a limitation on the order of steps. During the test, temperature control and pressure control are performed independently.

[0137] In one implementation, if the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, the fan is controlled to face the preset second position and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature; the preset second position is the position where the vent is located.

[0138] If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor equals the preset uniform temperature.

[0139] It should be noted that the controller can calculate the difference between the ambient temperature collected by the second and third temperature sensors in real time.

[0140] If the absolute value of the difference is greater than the preset ambient temperature difference threshold, the fan is controlled to face the preset third position and the fan is controlled to run until the absolute value of the difference is equal to the preset ambient temperature difference threshold; the preset third position is different from the preset second position.

[0141] It should be noted that before the test, the controller controls the heating device to operate at a preset first power until the battery temperature collected by the first temperature sensor equals the preset power reduction temperature. Then, the controller controls the heating device to operate at a preset second power until the battery temperature collected by the first temperature sensor equals the preset uniform temperature.

[0142] The motor is controlled to run at a preset first speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset speed reduction pressure. The motor is then controlled to run at a preset second speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset uniform pressure.

[0143] The battery testing method provided in this embodiment controls the fan and heating equipment through a controller to ensure that the battery temperature is close to a preset uniform temperature, reducing battery temperature differences. This not only ensures that the temperature of the same battery is close to the preset uniform temperature throughout the entire testing process, but also that the temperature of different batteries within the same batch or different batches is close to the preset uniform temperature, improving testing accuracy, stability, and consistency. Furthermore, controlling the motor ensures that the battery pressure is close to a preset uniform pressure, reducing battery pressure differences. This not only ensures that the pressure of the same battery is close to the preset uniform pressure throughout the entire testing process, but also that the pressure of different batteries within the same batch or different batches is close to the preset uniform pressure, improving testing accuracy, stability, and consistency.

[0144] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0145] Figure 7 This is a schematic diagram of an embodiment of the battery testing device provided in this application; the device can be integrated into the controller in the above embodiments, or it can be implemented through the controller in the above embodiments. Figure 7 As shown, the battery testing apparatus 70 includes:

[0146] Temperature control module 71 is used to control the operation of heating equipment or fan during the test based on a preset uniform temperature and the battery temperature collected by the first temperature sensor.

[0147] The pressure control module 72 is used to control the motor operation based on the preset uniform pressure and the battery pressure collected by the pressure sensor.

[0148] Furthermore, the temperature control module 71 is specifically used for:

[0149] If the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, the fan is controlled to face the preset first position and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature; the preset first position is the position where the battery is located.

[0150] If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor equals the preset uniform temperature.

[0151] Furthermore, the pressure control module 72 is specifically used for:

[0152] If the difference between the battery pressure and the preset uniform pressure is greater than the preset first pressure difference, the motor is controlled to run in the preset first direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure; the preset first direction is the direction that drives the lead screw to retract.

[0153] If the difference between the preset uniform pressure and the battery pressure is greater than the preset second pressure difference, the motor is controlled to run in the preset second direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure; the preset second direction is the direction in which the lead screw extends.

[0154] Furthermore, the temperature control module 71 is also used for:

[0155] If the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, the fan is controlled to face the preset second position and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature; the preset second position is the position of the vent.

[0156] If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor equals the preset uniform temperature.

[0157] Furthermore, the temperature control module 71 is also used for:

[0158] The difference between the ambient temperature collected by the second and third temperature sensors is calculated in real time.

[0159] If the absolute value of the difference is greater than the preset ambient temperature difference threshold, the fan is controlled to face the preset third position and the fan is controlled to run until the absolute value of the difference is equal to the preset ambient temperature difference threshold; the preset third position is different from the preset second position.

[0160] Furthermore, the temperature control module 71 is also used for:

[0161] Before the test, the heating device is controlled to operate at a preset first power until the battery temperature collected by the first temperature sensor is equal to the preset power reduction temperature. Then the heating device is controlled to operate at a preset second power until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature. The preset first power is greater than the preset second power, and the preset uniform temperature is greater than the preset power reduction temperature.

[0162] Pressure control module 72 is also used for:

[0163] The motor is controlled to run at a preset first speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset speed reduction pressure. The motor is then controlled to run at a preset second speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset uniform pressure. The preset first speed is greater than the preset second speed, the preset second direction is the direction that drives the lead screw to extend, and the preset uniform pressure is greater than the preset speed reduction pressure.

[0164] The battery testing device provided in this embodiment is used to execute the technical solution of the controller in any of the aforementioned method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0165] This application also provides a readable storage medium storing a computer program thereon, which, when executed by a processor, implements the technical solutions provided in any of the foregoing method embodiments.

[0166] This application also provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the technical solutions provided in any of the foregoing method embodiments.

[0167] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery testing fixture, characterized in that, include: Top plate, base, multiple support rods, motor, lead screw, pressure head, pressure sensor, first temperature sensor, heating equipment, fan and controller; The top plate and the base are connected by the plurality of support rods. The motor is fixedly installed below the top plate. The rotating shaft of the motor is connected to one end of the lead screw, and the other end of the lead screw is connected to the pressure head. The pressure sensor is located below the pressure head. The first temperature sensor is located at the projection position of the base. The heating device is located above the first temperature sensor. The controller is electrically connected to the pressure sensor, the first temperature sensor, the heating device, and the fan, respectively. The controller is used for: During the test, the heating device or the fan is controlled to operate according to the preset uniform temperature and the battery temperature collected by the first temperature sensor. The motor is controlled to operate based on a preset uniform pressure and the battery pressure collected by the pressure sensor.

2. The battery testing fixture according to claim 1, characterized in that, The controller, in controlling the operation of the heating device or the fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor, is specifically used for: If the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, then the fan is controlled to face the preset first direction and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature; the preset first direction is the location of the battery. If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature.

3. The battery testing fixture according to claim 1, characterized in that, The controller, in controlling the operation of the motor based on a preset uniform pressure and the battery pressure collected by the pressure sensor, is specifically used for: If the difference between the battery pressure and the preset uniform pressure is greater than the preset first pressure difference, the motor is controlled to run in a preset first direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure; the preset first direction is the direction that drives the lead screw to retract. If the difference between the preset uniform pressure and the battery pressure is greater than the preset second pressure difference, the motor is controlled to run in the preset second direction until the battery pressure collected by the pressure sensor is equal to the preset uniform pressure; the preset second direction is the direction in which the lead screw extends.

4. The battery testing fixture according to claim 1 or 3, characterized in that, The battery testing fixture also includes an insulation shell and a cover plate. The insulation shell has a vent, and the cover plate is movably connected to the outside of the vent via a pivot. The top plate, the base, the plurality of support rods, the motor, the lead screw, the pressure head, the pressure sensor, the first temperature sensor, the heating device, and the fan are all located inside the insulation shell; The controller, in controlling the operation of the heating device or the fan based on a preset uniform temperature and the battery temperature collected by the first temperature sensor, is specifically used for: If the difference between the battery temperature and the preset uniform temperature is greater than the preset first temperature difference, then the fan is controlled to face the preset second direction and the fan is controlled to run until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature. The preset second orientation is the orientation of the ventilation opening; If the difference between the preset uniform temperature and the battery temperature is greater than the preset second temperature difference, the heating device is controlled to heat until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature.

5. The battery testing fixture according to claim 4, characterized in that, The battery testing fixture also includes a second temperature sensor and a third temperature sensor; The second temperature sensor is located below the top plate, and the third temperature sensor is located above the base; The second temperature sensor and the third temperature sensor are electrically connected to the controller; The controller is also used for: The difference between the ambient temperatures collected by the second temperature sensor and the third temperature sensor is calculated in real time. If the absolute value of the difference is greater than the preset ambient temperature difference threshold, the fan is controlled to face the preset third position, and the fan is controlled to run until the absolute value of the difference is equal to the preset ambient temperature difference threshold. The preset third position is different from the preset second position.

6. The battery testing fixture according to any one of claims 1 to 3, characterized in that, The controller is also used for: Before testing, the heating device is controlled to operate at a preset first power until the battery temperature collected by the first temperature sensor is equal to the preset power reduction temperature. Then, the heating device is controlled to operate at a preset second power until the battery temperature collected by the first temperature sensor is equal to the preset uniform temperature. The preset first power is greater than the preset second power, and the preset uniform temperature is greater than the preset power reduction temperature. The motor is controlled to run at a preset first speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset speed reduction pressure. The motor is then controlled to run at a preset second speed and a preset second direction until the battery pressure collected by the pressure sensor equals the preset unified pressure. The preset first speed is greater than the preset second speed, the preset second direction is the direction that drives the lead screw to extend, and the preset unified pressure is greater than the preset speed reduction pressure.

7. A battery testing method, characterized in that, The controller applied in the battery test fixture according to any one of claims 1 to 6, the method comprising: During the test, the heating equipment or fan is controlled to operate based on the preset uniform temperature and the battery temperature collected by the first temperature sensor. The motor is controlled based on a preset uniform pressure and the battery pressure collected by a pressure sensor.

8. A battery testing device, characterized in that, A controller applied in a battery test fixture according to any one of claims 1 to 6, the device comprising: The temperature control module is used to control the operation of heating equipment or fan during the test, based on a preset uniform temperature and the battery temperature collected by the first temperature sensor. The pressure control module is used to control the motor operation based on a preset uniform pressure and the battery pressure collected by the pressure sensor.

9. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the battery testing method of claim 7.

10. A computer program product, characterized in that, It includes a computer program, which, when executed by a processor, is used to implement the battery testing method of claim 7.

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